[Lancaster, PA and New York, NY: American Institute of Physics, 1953]. First edition, extremely rare offprint, of the first of Feynman’s important papers which provided a quantum mechanical explanation of the superfluidity of liquid helium at temperatures below the ‘lambda-point’ of 2.18K. “The dramatic announcement of superfluidity of liquid He4..... More Item #4594

A rare example of Feynman’s signature, with a much rarer example of one of his eponymous diagrams in his hand. In fact, this diagram is almost identical to the first ever Feynman diagram that he drew in public, on the blackboard at the famous Pocono conference in the spring of..... More Item #4581

New York: W. W. Norton & Company, 1985. First edition, first printing, and a fine copy in a bright dust jacket, signed by Feynman and from the library of a second Nobel Prize winner, Edwin P. McMillan. Signed copies of this first printing are rare: Feynman was notorious for refusing... More Item #4459